./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:37:20,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:37:20,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:37:20,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:37:20,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:37:20,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:37:20,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:37:20,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:37:20,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:37:20,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:37:20,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:37:20,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:37:20,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:37:20,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:37:20,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:37:20,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:37:20,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:37:20,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:37:20,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:37:20,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:37:20,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:37:20,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:37:20,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:37:20,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:37:20,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:37:20,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:37:20,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:37:20,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:37:20,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:37:20,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:37:20,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:37:20,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:37:20,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:37:20,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:37:20,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:37:20,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:37:20,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:37:20,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:37:20,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:37:20,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:37:20,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:37:20,159 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:37:20,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:37:20,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:37:20,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:37:20,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:37:20,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:37:20,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:37:20,223 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:37:20,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:37:20,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:37:20,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:37:20,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:37:20,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:37:20,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:37:20,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:37:20,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:37:20,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:37:20,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:37:20,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:37:20,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:37:20,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:37:20,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:37:20,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:37:20,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:37:20,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:37:20,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:37:20,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:37:20,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:37:20,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:37:20,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:37:20,232 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:37:20,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:37:20,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:37:20,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2021-11-23 12:37:20,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:37:20,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:37:20,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:37:20,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:37:20,681 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:37:20,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2021-11-23 12:37:20,766 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/409f477fc/ce6cc75e0ec949efbfd29570e6ef22a8/FLAGfb442106e [2021-11-23 12:37:21,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:37:21,312 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2021-11-23 12:37:21,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/409f477fc/ce6cc75e0ec949efbfd29570e6ef22a8/FLAGfb442106e [2021-11-23 12:37:21,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/409f477fc/ce6cc75e0ec949efbfd29570e6ef22a8 [2021-11-23 12:37:21,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:37:21,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:37:21,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:37:21,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:37:21,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:37:21,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:37:21" (1/1) ... [2021-11-23 12:37:21,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d02a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:21, skipping insertion in model container [2021-11-23 12:37:21,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:37:21" (1/1) ... [2021-11-23 12:37:21,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:37:21,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:37:21,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2021-11-23 12:37:22,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:37:22,045 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:37:22,063 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2021-11-23 12:37:22,092 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:37:22,119 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:37:22,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22 WrapperNode [2021-11-23 12:37:22,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:37:22,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:37:22,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:37:22,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:37:22,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,201 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2021-11-23 12:37:22,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:37:22,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:37:22,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:37:22,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:37:22,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:37:22,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:37:22,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:37:22,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:37:22,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (1/1) ... [2021-11-23 12:37:22,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:37:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:22,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:37:22,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:37:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:37:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:37:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:37:22,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:37:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:37:22,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:37:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:37:22,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:37:22,447 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:37:22,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:37:22,627 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:37:22,635 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:37:22,635 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 12:37:22,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:37:22 BoogieIcfgContainer [2021-11-23 12:37:22,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:37:22,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:37:22,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:37:22,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:37:22,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:37:21" (1/3) ... [2021-11-23 12:37:22,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb95fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:37:22, skipping insertion in model container [2021-11-23 12:37:22,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:37:22" (2/3) ... [2021-11-23 12:37:22,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb95fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:37:22, skipping insertion in model container [2021-11-23 12:37:22,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:37:22" (3/3) ... [2021-11-23 12:37:22,648 INFO L111 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2021-11-23 12:37:22,655 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:37:22,655 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:37:22,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:37:22,772 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:37:22,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:37:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:37:22,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:22,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:22,822 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-11-23 12:37:22,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:22,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484860975] [2021-11-23 12:37:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:22,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:22,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:22,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043247568] [2021-11-23 12:37:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:22,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:22,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:23,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:37:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 12:37:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:23,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:37:23,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:23,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484860975] [2021-11-23 12:37:23,225 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043247568] [2021-11-23 12:37:23,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043247568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:23,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:23,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:37:23,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388410266] [2021-11-23 12:37:23,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:23,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:37:23,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:23,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:37:23,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:37:23,291 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:23,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:23,326 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-11-23 12:37:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:37:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:37:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:23,339 INFO L225 Difference]: With dead ends: 56 [2021-11-23 12:37:23,340 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 12:37:23,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:37:23,357 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:23,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:37:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 12:37:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 12:37:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-23 12:37:23,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-11-23 12:37:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:23,426 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-23 12:37:23,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-23 12:37:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:37:23,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:23,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:23,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:23,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 12:37:23,648 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-11-23 12:37:23,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:23,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277979160] [2021-11-23 12:37:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:23,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:23,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:23,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369184506] [2021-11-23 12:37:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:23,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:23,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:23,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:37:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:37:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:23,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:37:23,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:23,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277979160] [2021-11-23 12:37:23,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:23,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369184506] [2021-11-23 12:37:23,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369184506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:23,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:23,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:37:23,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673745678] [2021-11-23 12:37:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:23,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:37:23,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:37:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:37:23,887 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:23,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:23,931 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-11-23 12:37:23,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:37:23,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:37:23,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:23,933 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:37:23,933 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:37:23,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:37:23,936 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:23,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:37:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:37:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-23 12:37:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-11-23 12:37:23,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2021-11-23 12:37:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:23,946 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-23 12:37:23,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-11-23 12:37:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:37:23,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:23,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:23,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:24,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:24,163 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:24,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2021-11-23 12:37:24,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:24,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343699511] [2021-11-23 12:37:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:24,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:24,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:24,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90399012] [2021-11-23 12:37:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:24,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:24,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:24,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:24,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:37:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:37:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:24,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:37:24,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:24,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343699511] [2021-11-23 12:37:24,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:24,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90399012] [2021-11-23 12:37:24,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90399012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:24,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:24,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:37:24,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874200876] [2021-11-23 12:37:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:24,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:37:24,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:37:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:37:24,339 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:24,417 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-11-23 12:37:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:37:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:37:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:24,419 INFO L225 Difference]: With dead ends: 67 [2021-11-23 12:37:24,419 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 12:37:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:37:24,422 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:24,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:37:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 12:37:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-11-23 12:37:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-11-23 12:37:24,432 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-11-23 12:37:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:24,433 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-11-23 12:37:24,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-11-23 12:37:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:37:24,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:24,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:24,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:24,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2021-11-23 12:37:24,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:24,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670772309] [2021-11-23 12:37:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:24,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:24,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162013276] [2021-11-23 12:37:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:24,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:24,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:24,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:24,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:37:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:37:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:24,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:37:24,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:24,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670772309] [2021-11-23 12:37:24,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:24,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162013276] [2021-11-23 12:37:24,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162013276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:24,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:24,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:37:24,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765620578] [2021-11-23 12:37:24,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:24,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:37:24,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:37:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:37:24,861 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:24,944 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2021-11-23 12:37:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:37:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 12:37:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:24,946 INFO L225 Difference]: With dead ends: 67 [2021-11-23 12:37:24,947 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 12:37:24,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:37:24,951 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:24,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:37:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 12:37:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-11-23 12:37:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-11-23 12:37:24,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-11-23 12:37:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:24,975 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-11-23 12:37:24,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-11-23 12:37:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:37:24,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:24,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:25,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:25,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:25,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:25,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2021-11-23 12:37:25,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:25,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413596244] [2021-11-23 12:37:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:25,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:25,210 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:25,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608210154] [2021-11-23 12:37:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:25,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:25,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:25,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:25,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:37:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:25,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:37:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:25,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:37:25,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:25,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413596244] [2021-11-23 12:37:25,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:25,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608210154] [2021-11-23 12:37:25,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608210154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:37:25,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:37:25,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 12:37:25,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275729326] [2021-11-23 12:37:25,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:37:25,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:37:25,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:37:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:37:25,423 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:25,566 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2021-11-23 12:37:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:37:25,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 12:37:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:25,569 INFO L225 Difference]: With dead ends: 91 [2021-11-23 12:37:25,569 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 12:37:25,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:37:25,571 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:25,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:37:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 12:37:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-11-23 12:37:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-23 12:37:25,605 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2021-11-23 12:37:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:25,605 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-23 12:37:25,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-23 12:37:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 12:37:25,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:25,607 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:25,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:25,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:25,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2021-11-23 12:37:25,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:25,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270089550] [2021-11-23 12:37:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:25,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:25,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:25,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858770791] [2021-11-23 12:37:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:37:25,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:25,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:25,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:37:25,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 12:37:25,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:37:25,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:37:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 12:37:25,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:37:25,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270089550] [2021-11-23 12:37:25,959 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858770791] [2021-11-23 12:37:25,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858770791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:37:25,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:37:25,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:37:25,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264595017] [2021-11-23 12:37:25,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:37:25,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:37:25,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:37:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:37:25,962 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:26,024 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2021-11-23 12:37:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:37:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 12:37:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:26,033 INFO L225 Difference]: With dead ends: 121 [2021-11-23 12:37:26,033 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 12:37:26,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:37:26,036 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:26,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:37:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 12:37:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2021-11-23 12:37:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-11-23 12:37:26,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2021-11-23 12:37:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:26,064 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-11-23 12:37:26,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-11-23 12:37:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 12:37:26,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:26,066 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:26,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:26,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 12:37:26,283 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2021-11-23 12:37:26,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:26,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576160813] [2021-11-23 12:37:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:26,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:26,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:26,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220583512] [2021-11-23 12:37:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:26,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:26,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:26,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:26,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:37:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:37:26,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:37:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 12:37:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 12:37:26,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576160813] [2021-11-23 12:37:26,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220583512] [2021-11-23 12:37:26,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220583512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:37:26,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:37:26,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-23 12:37:26,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641519705] [2021-11-23 12:37:26,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:37:26,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 12:37:26,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 12:37:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:37:26,734 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:27,104 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2021-11-23 12:37:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:37:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 12:37:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:27,107 INFO L225 Difference]: With dead ends: 166 [2021-11-23 12:37:27,107 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 12:37:27,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:37:27,110 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:27,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:37:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 12:37:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-11-23 12:37:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2021-11-23 12:37:27,151 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2021-11-23 12:37:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:27,152 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2021-11-23 12:37:27,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2021-11-23 12:37:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 12:37:27,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:27,155 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:27,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:27,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 12:37:27,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2021-11-23 12:37:27,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:27,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040122669] [2021-11-23 12:37:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:27,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:27,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:27,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323841085] [2021-11-23 12:37:27,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:37:27,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:27,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:27,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:27,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:37:27,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:37:27,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:37:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:37:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 12:37:27,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 12:37:28,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:28,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040122669] [2021-11-23 12:37:28,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:28,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323841085] [2021-11-23 12:37:28,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323841085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:37:28,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:37:28,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-23 12:37:28,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536902807] [2021-11-23 12:37:28,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:37:28,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 12:37:28,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 12:37:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:37:28,199 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:29,068 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2021-11-23 12:37:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:37:29,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-23 12:37:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:29,071 INFO L225 Difference]: With dead ends: 316 [2021-11-23 12:37:29,072 INFO L226 Difference]: Without dead ends: 223 [2021-11-23 12:37:29,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:37:29,074 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:29,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:37:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-23 12:37:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2021-11-23 12:37:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2021-11-23 12:37:29,104 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2021-11-23 12:37:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:29,105 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2021-11-23 12:37:29,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2021-11-23 12:37:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 12:37:29,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:29,110 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:29,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:29,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:29,328 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2021-11-23 12:37:29,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:29,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375575368] [2021-11-23 12:37:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:29,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:29,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:29,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596860541] [2021-11-23 12:37:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:37:29,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:29,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:29,355 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:29,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:37:29,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 12:37:29,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:37:29,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:37:29,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:37:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-11-23 12:37:29,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:37:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2021-11-23 12:37:30,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:37:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375575368] [2021-11-23 12:37:30,341 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:37:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596860541] [2021-11-23 12:37:30,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596860541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:37:30,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:37:30,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 12:37:30,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978727378] [2021-11-23 12:37:30,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:37:30,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:37:30,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:37:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:37:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:37:30,350 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:37:30,548 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2021-11-23 12:37:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:37:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 12:37:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:37:30,556 INFO L225 Difference]: With dead ends: 852 [2021-11-23 12:37:30,556 INFO L226 Difference]: Without dead ends: 703 [2021-11-23 12:37:30,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:37:30,562 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:37:30,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:37:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-11-23 12:37:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2021-11-23 12:37:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2021-11-23 12:37:30,633 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2021-11-23 12:37:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:37:30,634 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2021-11-23 12:37:30,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:37:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2021-11-23 12:37:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-23 12:37:30,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:37:30,656 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:37:30,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:37:30,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:37:30,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:37:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:37:30,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2021-11-23 12:37:30,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:37:30,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412649736] [2021-11-23 12:37:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:37:30,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:37:30,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 12:37:30,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657718547] [2021-11-23 12:37:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:37:30,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:37:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:37:30,912 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:37:30,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:37:31,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:37:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:37:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2021-11-23 12:37:31,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:40:57,230 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-23 12:40:57,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-23 12:40:57,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:40:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412649736] [2021-11-23 12:40:57,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 12:40:57,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657718547] [2021-11-23 12:40:57,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-23 12:40:57,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:40:57,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-23 12:40:57,232 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-23 12:40:57,232 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-23 12:40:57,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 12:40:57,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:40:57,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:40:57,453 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1] [2021-11-23 12:40:57,457 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 12:40:57,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:40:57 BoogieIcfgContainer [2021-11-23 12:40:57,597 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 12:40:57,598 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:40:57,598 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:40:57,598 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:40:57,599 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:37:22" (3/4) ... [2021-11-23 12:40:57,603 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 12:40:57,603 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:40:57,604 INFO L158 Benchmark]: Toolchain (without parser) took 215903.28ms. Allocated memory was 107.0MB in the beginning and 195.0MB in the end (delta: 88.1MB). Free memory was 78.0MB in the beginning and 98.5MB in the end (delta: -20.5MB). Peak memory consumption was 67.2MB. Max. memory is 16.1GB. [2021-11-23 12:40:57,604 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 107.0MB. Free memory is still 64.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:40:57,605 INFO L158 Benchmark]: CACSL2BoogieTranslator took 401.66ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 77.7MB in the beginning and 108.6MB in the end (delta: -30.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:40:57,605 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.16ms. Allocated memory is still 134.2MB. Free memory was 108.6MB in the beginning and 107.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:40:57,605 INFO L158 Benchmark]: Boogie Preprocessor took 68.60ms. Allocated memory is still 134.2MB. Free memory was 107.0MB in the beginning and 105.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:40:57,606 INFO L158 Benchmark]: RCFGBuilder took 365.51ms. Allocated memory is still 134.2MB. Free memory was 105.9MB in the beginning and 95.0MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 12:40:57,606 INFO L158 Benchmark]: TraceAbstraction took 214957.24ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 94.4MB in the beginning and 98.5MB in the end (delta: -4.1MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. [2021-11-23 12:40:57,607 INFO L158 Benchmark]: Witness Printer took 5.36ms. Allocated memory is still 195.0MB. Free memory is still 98.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:40:57,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 107.0MB. Free memory is still 64.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 401.66ms. Allocated memory was 107.0MB in the beginning and 134.2MB in the end (delta: 27.3MB). Free memory was 77.7MB in the beginning and 108.6MB in the end (delta: -30.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.16ms. Allocated memory is still 134.2MB. Free memory was 108.6MB in the beginning and 107.0MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 68.60ms. Allocated memory is still 134.2MB. Free memory was 107.0MB in the beginning and 105.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 365.51ms. Allocated memory is still 134.2MB. Free memory was 105.9MB in the beginning and 95.0MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 214957.24ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 94.4MB in the beginning and 98.5MB in the end (delta: -4.1MB). Peak memory consumption was 59.9MB. Max. memory is 16.1GB. * Witness Printer took 5.36ms. Allocated memory is still 195.0MB. Free memory is still 98.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int i,j,k; [L17] int m=1000,n=1500,p=1800; [L18] int A [m][n][p]; [L19] int max; [L22] i=0 [L23] j=0 [L24] k=0 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND TRUE i < m [L26] j=0 [L27] k=0 [L28] COND TRUE j < n [L29] k=0 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND TRUE k < p [L31] A[i][j][k]= __VERIFIER_nondet_int() [L32] k=k+1 [L30] COND FALSE !(k < p) [L34] j=j+1 [L28] COND FALSE !(j < n) [L36] i=i+1 [L25] COND FALSE !(i < m) [L41] i=0 [L42] j=0 [L43] k=0 [L44] EXPR A [0][0][0] [L44] max=A [0][0][0] [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L48] COND FALSE !(j < n) [L57] i=i+1 [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L48] COND FALSE !(j < n) [L57] i=i+1 [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L48] COND FALSE !(j < n) [L57] i=i+1 [L45] COND TRUE i < m [L46] j=0 [L47] k=0 [L48] COND TRUE j < n [L49] k=0 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND TRUE k < p [L51] EXPR A[i][j][k] [L51] COND TRUE A[i][j][k]>max [L52] EXPR A[i][j][k] [L52] max=A[i][j][k] [L53] k=k+1 [L50] COND FALSE !(k < p) [L55] j=j+1 [L48] COND FALSE !(j < n) [L57] i=i+1 [L45] COND FALSE !(i < m) [L63] i=0 [L64] j=0 [L65] k=0 [L66] COND TRUE i < m [L67] j=0 [L68] k=0 [L69] COND TRUE j < n [L70] k=0 [L71] COND TRUE k < p [L72] EXPR A[i][j][k] [L72] CALL __VERIFIER_assert(A[i][j][k]<=max) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 214.7s, OverallIterations: 10, TraceHistogramMax: 88, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1571 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1571 mSDsluCounter, 580 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 346 mSDsCounter, 608 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 391 IncrementalHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 608 mSolverCounterUnsat, 234 mSDtfsCounter, 391 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=9, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 368 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 208.6s InterpolantComputationTime, 716 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 523 ConstructedInterpolants, 0 QuantifiedInterpolants, 1623 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1873 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 2311/2445 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:41:00,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:41:00,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:41:00,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:41:00,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:41:00,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:41:00,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:41:00,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:41:00,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:41:00,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:41:00,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:41:00,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:41:00,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:41:00,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:41:00,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:41:00,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:41:00,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:41:00,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:41:00,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:41:00,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:41:00,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:41:00,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:41:00,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:41:00,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:41:00,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:41:00,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:41:00,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:41:00,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:41:00,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:41:00,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:41:00,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:41:00,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:41:00,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:41:00,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:41:00,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:41:00,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:41:00,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:41:00,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:41:00,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:41:00,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:41:00,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:41:00,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-23 12:41:00,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:41:00,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:41:00,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:41:00,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:41:00,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:41:00,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:41:00,433 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:41:00,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:41:00,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:41:00,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:41:00,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:41:00,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:41:00,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:41:00,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:41:00,437 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:41:00,437 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 12:41:00,437 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 12:41:00,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:41:00,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:41:00,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:41:00,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:41:00,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:41:00,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:41:00,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:41:00,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:41:00,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:41:00,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:41:00,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:41:00,441 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 12:41:00,441 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 12:41:00,441 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:41:00,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:41:00,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:41:00,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:41:00,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 12:41:00,443 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c8d330fcf7e017e6b51632eb7a9f8f167fb4f3e932700b6ef82da7b1572a2f0 [2021-11-23 12:41:00,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:41:00,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:41:00,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:41:00,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:41:00,979 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:41:00,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2021-11-23 12:41:01,074 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/25243d910/23692ff114ba4836afb720048148653f/FLAGc30a002cd [2021-11-23 12:41:01,765 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:41:01,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/sv-benchmarks/c/array-multidimensional/max-3-n-u.c [2021-11-23 12:41:01,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/25243d910/23692ff114ba4836afb720048148653f/FLAGc30a002cd [2021-11-23 12:41:02,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/data/25243d910/23692ff114ba4836afb720048148653f [2021-11-23 12:41:02,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:41:02,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:41:02,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:41:02,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:41:02,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:41:02,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da6be47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02, skipping insertion in model container [2021-11-23 12:41:02,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:41:02,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:41:02,328 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2021-11-23 12:41:02,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:41:02,371 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:41:02,411 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/sv-benchmarks/c/array-multidimensional/max-3-n-u.c[321,334] [2021-11-23 12:41:02,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:41:02,468 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:41:02,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02 WrapperNode [2021-11-23 12:41:02,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:41:02,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:41:02,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:41:02,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:41:02,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,530 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-11-23 12:41:02,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:41:02,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:41:02,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:41:02,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:41:02,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:41:02,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:41:02,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:41:02,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:41:02,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (1/1) ... [2021-11-23 12:41:02,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:41:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:41:02,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:41:02,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:41:02,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:41:02,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 12:41:02,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:41:02,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 12:41:02,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:41:02,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:41:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:41:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 12:41:02,791 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:41:02,796 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:41:03,465 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:41:03,474 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:41:03,474 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 12:41:03,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:41:03 BoogieIcfgContainer [2021-11-23 12:41:03,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:41:03,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:41:03,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:41:03,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:41:03,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:41:02" (1/3) ... [2021-11-23 12:41:03,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d0126f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:41:03, skipping insertion in model container [2021-11-23 12:41:03,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:41:02" (2/3) ... [2021-11-23 12:41:03,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d0126f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:41:03, skipping insertion in model container [2021-11-23 12:41:03,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:41:03" (3/3) ... [2021-11-23 12:41:03,488 INFO L111 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2021-11-23 12:41:03,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:41:03,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:41:03,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:41:03,592 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:41:03,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:41:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:41:03,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:03,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:03,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-11-23 12:41:03,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488234485] [2021-11-23 12:41:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:03,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:03,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:03,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 12:41:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 12:41:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:41:03,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:41:03,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488234485] [2021-11-23 12:41:03,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488234485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:41:03,926 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:41:03,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 12:41:03,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102333856] [2021-11-23 12:41:03,930 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:41:03,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:41:03,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:41:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:41:03,973 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:03,996 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-11-23 12:41:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:41:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:41:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:04,009 INFO L225 Difference]: With dead ends: 56 [2021-11-23 12:41:04,009 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 12:41:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:41:04,026 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:04,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:41:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 12:41:04,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 12:41:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-23 12:41:04,069 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-11-23 12:41:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:04,070 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-23 12:41:04,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:04,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-11-23 12:41:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:41:04,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:04,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:04,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:04,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:04,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:04,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-11-23 12:41:04,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:04,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637574028] [2021-11-23 12:41:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:04,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:04,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:04,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:04,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 12:41:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:04,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:41:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:41:04,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:41:04,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637574028] [2021-11-23 12:41:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637574028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:41:04,640 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:41:04,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 12:41:04,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894426995] [2021-11-23 12:41:04,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:41:04,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:41:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:41:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:41:04,649 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:05,014 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2021-11-23 12:41:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:41:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:41:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:05,024 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:41:05,024 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 12:41:05,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:41:05,027 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:05,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 46 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:41:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 12:41:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 12:41:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-11-23 12:41:05,038 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2021-11-23 12:41:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:05,039 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-11-23 12:41:05,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-11-23 12:41:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:41:05,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:05,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:05,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:05,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:05,260 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash 949119361, now seen corresponding path program 1 times [2021-11-23 12:41:05,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:05,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551742195] [2021-11-23 12:41:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:05,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:05,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:05,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 12:41:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:05,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:41:05,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:41:05,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:41:05,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551742195] [2021-11-23 12:41:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551742195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:41:05,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:41:05,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:41:05,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030991726] [2021-11-23 12:41:05,577 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:41:05,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:41:05,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:05,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:41:05,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:41:05,584 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:06,032 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2021-11-23 12:41:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:41:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 12:41:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:06,035 INFO L225 Difference]: With dead ends: 81 [2021-11-23 12:41:06,035 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 12:41:06,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:41:06,037 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:06,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:41:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 12:41:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-11-23 12:41:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-23 12:41:06,064 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 17 [2021-11-23 12:41:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:06,065 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-23 12:41:06,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-23 12:41:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 12:41:06,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:06,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:06,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:06,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:06,283 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209855, now seen corresponding path program 1 times [2021-11-23 12:41:06,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:06,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274629970] [2021-11-23 12:41:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:06,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:06,287 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:06,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 12:41:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:06,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:41:06,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 12:41:06,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 12:41:06,607 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274629970] [2021-11-23 12:41:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274629970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:41:06,612 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:41:06,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:41:06,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199881689] [2021-11-23 12:41:06,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:41:06,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:41:06,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:41:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:41:06,617 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:07,182 INFO L93 Difference]: Finished difference Result 126 states and 179 transitions. [2021-11-23 12:41:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:41:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 12:41:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:07,185 INFO L225 Difference]: With dead ends: 126 [2021-11-23 12:41:07,185 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 12:41:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:41:07,188 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:07,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 54 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:41:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 12:41:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-11-23 12:41:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 74 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-11-23 12:41:07,209 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 29 [2021-11-23 12:41:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:07,209 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-11-23 12:41:07,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-11-23 12:41:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 12:41:07,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:07,212 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:07,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:07,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:07,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1070930817, now seen corresponding path program 1 times [2021-11-23 12:41:07,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:07,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036829003] [2021-11-23 12:41:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:07,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:07,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:07,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:07,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 12:41:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 12:41:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 12:41:07,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 12:41:07,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036829003] [2021-11-23 12:41:07,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036829003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:41:07,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:41:07,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-23 12:41:07,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180817139] [2021-11-23 12:41:07,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:41:07,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 12:41:07,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:41:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:41:07,949 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:09,313 INFO L93 Difference]: Finished difference Result 220 states and 305 transitions. [2021-11-23 12:41:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 12:41:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-23 12:41:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:09,317 INFO L225 Difference]: With dead ends: 220 [2021-11-23 12:41:09,317 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 12:41:09,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:41:09,320 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 151 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:09,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 127 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 12:41:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 12:41:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2021-11-23 12:41:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.2753623188405796) internal successors, (176), 138 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2021-11-23 12:41:09,361 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 37 [2021-11-23 12:41:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:09,361 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2021-11-23 12:41:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2021-11-23 12:41:09,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 12:41:09,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:09,364 INFO L514 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:09,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:09,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:09,580 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:09,581 INFO L85 PathProgramCache]: Analyzing trace with hash 580912001, now seen corresponding path program 2 times [2021-11-23 12:41:09,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:09,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894697922] [2021-11-23 12:41:09,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:41:09,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:09,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:09,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:09,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 12:41:09,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 12:41:09,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:41:09,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:41:09,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-23 12:41:09,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-23 12:41:10,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894697922] [2021-11-23 12:41:10,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894697922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:41:10,077 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:41:10,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 12:41:10,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965793810] [2021-11-23 12:41:10,078 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:41:10,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:41:10,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:41:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:41:10,079 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:10,610 INFO L93 Difference]: Finished difference Result 281 states and 363 transitions. [2021-11-23 12:41:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:41:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-23 12:41:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:10,615 INFO L225 Difference]: With dead ends: 281 [2021-11-23 12:41:10,616 INFO L226 Difference]: Without dead ends: 233 [2021-11-23 12:41:10,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:41:10,618 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:10,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 43 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:41:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-23 12:41:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 185. [2021-11-23 12:41:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2880434782608696) internal successors, (237), 184 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 237 transitions. [2021-11-23 12:41:10,660 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 237 transitions. Word has length 53 [2021-11-23 12:41:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:10,661 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 237 transitions. [2021-11-23 12:41:10,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 237 transitions. [2021-11-23 12:41:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 12:41:10,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:10,674 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:10,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:10,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:10,887 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1991188929, now seen corresponding path program 1 times [2021-11-23 12:41:10,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:10,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587203458] [2021-11-23 12:41:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:10,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:10,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:10,890 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:10,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 12:41:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 12:41:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2021-11-23 12:41:11,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2021-11-23 12:41:12,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587203458] [2021-11-23 12:41:12,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587203458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:41:12,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:41:12,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-23 12:41:12,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662473393] [2021-11-23 12:41:12,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:41:12,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 12:41:12,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 12:41:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-23 12:41:12,632 INFO L87 Difference]: Start difference. First operand 185 states and 237 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:16,845 INFO L93 Difference]: Finished difference Result 562 states and 780 transitions. [2021-11-23 12:41:16,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 12:41:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 12:41:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:16,849 INFO L225 Difference]: With dead ends: 562 [2021-11-23 12:41:16,849 INFO L226 Difference]: Without dead ends: 388 [2021-11-23 12:41:16,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:41:16,852 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 563 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:16,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 326 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 12:41:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-23 12:41:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 361. [2021-11-23 12:41:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 360 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 461 transitions. [2021-11-23 12:41:16,905 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 461 transitions. Word has length 143 [2021-11-23 12:41:16,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:16,906 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 461 transitions. [2021-11-23 12:41:16,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 461 transitions. [2021-11-23 12:41:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-23 12:41:16,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:16,913 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:16,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:17,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:17,127 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 669470145, now seen corresponding path program 2 times [2021-11-23 12:41:17,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797522584] [2021-11-23 12:41:17,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:41:17,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:17,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:17,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 12:41:17,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:41:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:41:17,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 12:41:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 682 proven. 105 refuted. 0 times theorem prover too weak. 5883 trivial. 0 not checked. [2021-11-23 12:41:18,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 682 proven. 105 refuted. 0 times theorem prover too weak. 5883 trivial. 0 not checked. [2021-11-23 12:41:20,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797522584] [2021-11-23 12:41:20,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797522584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:41:20,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:41:20,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-23 12:41:20,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667500453] [2021-11-23 12:41:20,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:41:20,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 12:41:20,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:20,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 12:41:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 12:41:20,620 INFO L87 Difference]: Start difference. First operand 361 states and 461 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:32,687 INFO L93 Difference]: Finished difference Result 1114 states and 1540 transitions. [2021-11-23 12:41:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 12:41:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-23 12:41:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:32,693 INFO L225 Difference]: With dead ends: 1114 [2021-11-23 12:41:32,693 INFO L226 Difference]: Without dead ends: 772 [2021-11-23 12:41:32,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 12:41:32,698 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1765 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:32,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 1171 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 12:41:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-23 12:41:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 713. [2021-11-23 12:41:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.276685393258427) internal successors, (909), 712 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 909 transitions. [2021-11-23 12:41:32,771 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 909 transitions. Word has length 271 [2021-11-23 12:41:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:32,772 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 909 transitions. [2021-11-23 12:41:32,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 909 transitions. [2021-11-23 12:41:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-23 12:41:32,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:32,787 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:32,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:33,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:33,003 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:33,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1185916353, now seen corresponding path program 3 times [2021-11-23 12:41:33,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:33,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328084919] [2021-11-23 12:41:33,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:41:33,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:33,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:33,006 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:33,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 12:41:33,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 12:41:33,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:41:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:41:33,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 12:41:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 29333 trivial. 0 not checked. [2021-11-23 12:41:35,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:38,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-11-23 12:41:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 29333 trivial. 0 not checked. [2021-11-23 12:41:38,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328084919] [2021-11-23 12:41:38,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328084919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 12:41:38,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:41:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-23 12:41:38,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461668673] [2021-11-23 12:41:38,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 12:41:38,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 12:41:38,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:41:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:41:38,547 INFO L87 Difference]: Start difference. First operand 713 states and 909 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:41,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 12:41:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:41:41,996 INFO L93 Difference]: Finished difference Result 1462 states and 1907 transitions. [2021-11-23 12:41:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:41:41,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2021-11-23 12:41:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:41:42,004 INFO L225 Difference]: With dead ends: 1462 [2021-11-23 12:41:42,004 INFO L226 Difference]: Without dead ends: 895 [2021-11-23 12:41:42,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:41:42,007 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:41:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 60 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 12:41:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-11-23 12:41:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 713. [2021-11-23 12:41:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.2752808988764044) internal successors, (908), 712 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 908 transitions. [2021-11-23 12:41:42,082 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 908 transitions. Word has length 527 [2021-11-23 12:41:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:41:42,083 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 908 transitions. [2021-11-23 12:41:42,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:41:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 908 transitions. [2021-11-23 12:41:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-23 12:41:42,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:41:42,110 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 119, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:41:42,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:41:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:41:42,324 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:41:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:41:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1615866625, now seen corresponding path program 1 times [2021-11-23 12:41:42,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:41:42,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807660330] [2021-11-23 12:41:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:41:42,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:41:42,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:41:42,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:41:42,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 12:41:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:41:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 12:41:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:41:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 2890 proven. 465 refuted. 0 times theorem prover too weak. 26227 trivial. 0 not checked. [2021-11-23 12:41:45,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:41:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 29582 backedges. 2890 proven. 465 refuted. 0 times theorem prover too weak. 26227 trivial. 0 not checked. [2021-11-23 12:41:50,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:41:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807660330] [2021-11-23 12:41:50,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807660330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:41:50,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:41:50,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-23 12:41:50,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190459130] [2021-11-23 12:41:50,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:41:50,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 12:41:50,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:41:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 12:41:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=3137, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 12:41:50,691 INFO L87 Difference]: Start difference. First operand 713 states and 908 transitions. Second operand has 66 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:42:38,191 INFO L93 Difference]: Finished difference Result 2218 states and 3058 transitions. [2021-11-23 12:42:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 12:42:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2021-11-23 12:42:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:42:38,203 INFO L225 Difference]: With dead ends: 2218 [2021-11-23 12:42:38,203 INFO L226 Difference]: Without dead ends: 1540 [2021-11-23 12:42:38,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 988 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=3199, Invalid=6113, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 12:42:38,209 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 7379 mSDsluCounter, 4225 mSDsCounter, 0 mSdLazyCounter, 6321 mSolverCounterSat, 2531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7379 SdHoareTripleChecker+Valid, 4370 SdHoareTripleChecker+Invalid, 8852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2531 IncrementalHoareTripleChecker+Valid, 6321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:42:38,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7379 Valid, 4370 Invalid, 8852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2531 Valid, 6321 Invalid, 0 Unknown, 0 Unchecked, 29.0s Time] [2021-11-23 12:42:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-11-23 12:42:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1417. [2021-11-23 12:42:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.2740112994350283) internal successors, (1804), 1416 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 1804 transitions. [2021-11-23 12:42:38,342 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 1804 transitions. Word has length 527 [2021-11-23 12:42:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:42:38,344 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 1804 transitions. [2021-11-23 12:42:38,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:42:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 1804 transitions. [2021-11-23 12:42:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1040 [2021-11-23 12:42:38,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:42:38,372 INFO L514 BasicCegarLoop]: trace histogram [248, 248, 248, 247, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:42:38,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:42:38,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:42:38,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:42:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:42:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1551178497, now seen corresponding path program 2 times [2021-11-23 12:42:38,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:42:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255100354] [2021-11-23 12:42:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:42:38,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:42:38,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:42:38,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:42:38,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 12:42:40,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:42:40,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:42:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-23 12:42:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:42:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 124558 backedges. 11914 proven. 1953 refuted. 0 times theorem prover too weak. 110691 trivial. 0 not checked. [2021-11-23 12:42:45,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:43:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 124558 backedges. 11914 proven. 1953 refuted. 0 times theorem prover too weak. 110691 trivial. 0 not checked. [2021-11-23 12:43:03,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 12:43:03,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255100354] [2021-11-23 12:43:03,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255100354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:43:03,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:43:03,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 130 [2021-11-23 12:43:03,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30113027] [2021-11-23 12:43:03,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:43:03,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-23 12:43:03,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 12:43:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-23 12:43:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4353, Invalid=12417, Unknown=0, NotChecked=0, Total=16770 [2021-11-23 12:43:03,090 INFO L87 Difference]: Start difference. First operand 1417 states and 1804 transitions. Second operand has 130 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:47:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:47:28,241 INFO L93 Difference]: Finished difference Result 4426 states and 6098 transitions. [2021-11-23 12:47:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-23 12:47:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1039 [2021-11-23 12:47:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:47:28,290 INFO L225 Difference]: With dead ends: 4426 [2021-11-23 12:47:28,290 INFO L226 Difference]: Without dead ends: 3076 [2021-11-23 12:47:28,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2139 GetRequests, 1948 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6048 ImplicationChecksByTransitivity, 177.5s TimeCoverageRelationStatistics Valid=12543, Invalid=24513, Unknown=0, NotChecked=0, Total=37056 [2021-11-23 12:47:28,304 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 29627 mSDsluCounter, 16642 mSDsCounter, 0 mSdLazyCounter, 24945 mSolverCounterSat, 9254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29627 SdHoareTripleChecker+Valid, 16915 SdHoareTripleChecker+Invalid, 34199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 9254 IncrementalHoareTripleChecker+Valid, 24945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:47:28,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29627 Valid, 16915 Invalid, 34199 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [9254 Valid, 24945 Invalid, 0 Unknown, 0 Unchecked, 103.1s Time] [2021-11-23 12:47:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-11-23 12:47:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2825. [2021-11-23 12:47:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 1.273371104815864) internal successors, (3596), 2824 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:47:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3596 transitions. [2021-11-23 12:47:28,725 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3596 transitions. Word has length 1039 [2021-11-23 12:47:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:47:28,726 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 3596 transitions. [2021-11-23 12:47:28,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 130 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:47:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3596 transitions. [2021-11-23 12:47:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2064 [2021-11-23 12:47:28,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:47:28,836 INFO L514 BasicCegarLoop]: trace histogram [504, 504, 504, 503, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:47:28,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:47:29,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 12:47:29,065 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:47:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:47:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -624884481, now seen corresponding path program 3 times [2021-11-23 12:47:29,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 12:47:29,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11065030] [2021-11-23 12:47:29,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:47:29,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 12:47:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 12:47:29,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 12:47:29,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20408e24-3fcf-446d-a5c0-08e0e7d5861b/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process